Temp Gauge Not Working

[Rally200]

1989 318i M40..Gauge has never worked since I`ve had the car (about a month)
Wiki suggests earthing terminal 4 on plug C101 as a starting point, trouble is there`s no actual electrical terminal at No4.
Next step Wiki recommends is to check the brown plug. Can`t locate where it is, I know it`s under the intake manifold, but it`s pretty busy under there, there`s a couple of electrical connection points there but not sure if one of them connects to the brown plug, anyone got any suggestions?

[Grrrmachine]

Wiki suggests earthing terminal 4 on plug C101 as a starting point, trouble is there`s no actual electrical terminal at No4.

That'll be the source of your problem then! Pin 4 has controlled the temp gauge since the E30 was made, so there's no chance that you have a rare E30 with the pin missing. Either a previous owner molested your loom, or you're counting the pins wrong.

[Brianmoooore]

Wiki suggests earthing terminal 4 on plug C101 as a starting point, trouble is there`s no actual electrical terminal at No4.

That'll be the source of your problem then! Pin 4 has controlled the temp gauge since the E30 was made, so there's no chance that you have a rare E30 with the pin missing. Either a previous owner molested your loom, or you're counting the pins wrong.

Or you are confusing the diagnostic socket with the C101.

[Rally200]

Ahh..might've been looking at the diagnostic socket then.. was checking the circular screw top unit that's between the fuse box and servo unit. Guessing that's not the C101 plug?

[Brianmoooore]

C101 is right by it, but you have to remove the engine loom plug to access the pins in the socket.

[Rally200]

Thank you Mr Moooore, I`ll check tonight.